Revert "removed \bold formatting from AoS canonical"
Revert "removed \bold formatting from AoS canonical"

This reverts commit 0c2ef38aed84129c651abbf5c102f11f57dffbac.

Our parser should be able to omit non-semantic LaTeX command, no need
to do this work in crawler stage.

t-k-/the-day-after-tomorrow,t-k-/the-day-after-tomorrow,approach0/search-engine,t-k-/the-day-after-tomorrow,approach0/search-engine,approach0/search-engine,t-k-/the-day-after-tomorrow,t-k-/the-day-after-tomorrow,t-k-/the-day-after-tomorrow,approach0/search-engine,t-k-/the-day-after-tomorrow